EP0756857A2 - Hospital bed with user care apparatus - Google Patents
Hospital bed with user care apparatus Download PDFInfo
- Publication number
- EP0756857A2 EP0756857A2 EP96305728A EP96305728A EP0756857A2 EP 0756857 A2 EP0756857 A2 EP 0756857A2 EP 96305728 A EP96305728 A EP 96305728A EP 96305728 A EP96305728 A EP 96305728A EP 0756857 A2 EP0756857 A2 EP 0756857A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bed
- frame
- care
- wheelchair
- commode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 201000000585 muscular atrophy Diseases 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000037081 physical activity Effects 0.000 description 1
- 238000000554 physical therapy Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
- A61G7/16—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto converting a lying surface into a chair
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
- A61B50/10—Furniture specially adapted for surgical or diagnostic appliances or instruments
- A61B50/13—Trolleys, e.g. carts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/0015—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having means for attaching a cabinet in order to transport bed and cabinet together
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
- A61G7/015—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame divided into different adjustable sections, e.g. for Gatch position
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- A—HUMAN NECESSITIES
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- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/0506—Head or foot boards
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/0507—Side-rails
- A61G7/0512—Side-rails characterised by customised length
- A61G7/0513—Side-rails characterised by customised length covering particular sections of the bed, e.g. one or more partial side-rail sections along the bed
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/0527—Weighing devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/0528—Steering or braking devices for castor wheels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/053—Aids for getting into, or out of, bed, e.g. steps, chairs, cane-like supports
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/04—Wheeled walking aids for patients or disabled persons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/44—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons
- G01G19/445—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons in a horizontal position
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/74—Manipulators with manual electric input means
- A61B2034/742—Joysticks
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/50—Supports for surgical instruments, e.g. articulated arms
- A61B2090/506—Supports for surgical instruments, e.g. articulated arms using a parallelogram linkage, e.g. panthograph
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2200/00—Information related to the kind of patient or his position
- A61G2200/50—Information related to the kind of patient or his position the patient is supported by a specific part of the body
- A61G2200/56—Calf
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort
- A61G2203/80—General characteristics of devices with special adaptations, e.g. for safety or comfort for connecting a trolley to a device, e.g. bed or column table
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/14—Standing-up or sitting-down aids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/02—Beds specially adapted for nursing; Devices for lifting patients or disabled persons with toilet conveniences, or specially adapted for use with toilets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
- A61G7/1038—Manual lifting aids, e.g. frames or racks
Definitions
- This invention relates generally to hospital beds, and more particularly to a combination of a hospital bed that converts from a bed configuration to a chair configuration in combination with different user care modules.
- a hospital bed which automatically converts from a bed configuration to a chair configuration.
- a hospital bed is disclosed in co-pending U.S. patent application Serial No. 08/277,243 assigned to the assignee of the present invention, and in U.S. Patent Nos. 5,454,126 issued 03 October 1995 and 5,479,666 issued 02 January 1996.
- chair beds are disclosed which have vacatable foot sections which, when the user support platform is lowered to a lowermost position, allow the user's feet to rest directly on the floor. Pivoting footboard halves convert into side guards/handrails that extend longitudinally from the foot end of the bed.
- the handrails may be grasped by the user to provide stabilization and support in moving from a sitting position to a standing position and in leaving the chair configured bed. Further, the user can also selectively raise and lower the bed to facilitate moving either from a seated to a standing position, or, from a standing to a seated position, respectively.
- the above described hospital bed permits a new method of user handling and care as disclosed in U.S. Pat. No. 5,513,406 issued 07 May 1996, in which a single hospital bed replaces the up to three prior hospital beds of traditional and different designs. Further, the method provides for the docking of different user care modules to the hospital bed during different user care stages.
- An object of the present invention is to provide a hospital bed in combination with different user care modules that provides an environment accommodating user weaknesses and disabilities and that raises the level of physical security for a user in the process of moving from the hospital bed to different ones of the user care modules.
- Another object of the invention is to provide a hospital bed in combination with different user care modules that provides guidance and support for a user in the process of moving from the hospital bed to another user care module, thereby reducing user fear and enhancing user confidence.
- a further object of the invention is to provide a hospital bed in combination with different user care modules that provides a higher level of user independence and self sufficiency, thereby encouraging a user to engage in physical activity and therapy to reduce muscular atrophy and increase a user's sense of wellness.
- the present invention provides a combination of a hospital bed that moves from a bed position to a chair position and different user care modules located at the foot end of the bed so that a user may interface with the user care modules with a high level of security and confidence.
- a bed in accordance with the described embodiments, includes a base having a head end and a foot end.
- a support platform is mounted on the base and is selectively moveable between a generally planar bed position and a chair position.
- the support platform includes a head panel that moves to a raised position when moving the support platform to the chair position.
- the support platform further includes leg and foot panels that move relative to each other and the head panel to a position that allows the patient to leave the bed at the foot end of the base and frame assembly.
- a care/therapy module is removably coupled to the foot end of the base and frame assembly.
- the care/therapy module may be a general purpose cart, a motorized leg exercise device, a walking exercise device, a non-motorized leg exercise device, a commode, a wheelchair and/or a hydrotherapy unit.
- Fig. 1 is a perspective view of a hospital bed in accordance with the principles of the present invention.
- Fig. 2 is a perspective view of the hospital bed in a chair configuration.
- Fig. 3 is a partial perspective view of the hospital bed in combination with a general purpose cart connected thereto.
- Fig. 4 is a view taken along line 4-4 of Fig. 3.
- Fig. 5 is a partial perspective view of the hospital bed in combination with a cart containing a passive motion device.
- Fig. 6 is a partial perspective view of the hospital bed in combination with and connected to a treadmill.
- Fig. 7 is a partial perspective view of the hospital bed in combination with and connected to a water care/therapy unit.
- Fig. 8 is a partial perspective view of the hospital bed connected to and in combination with a portable commode module.
- Fig. 9 is a partial perspective view of the hospital bed connected to and in combination with a wheelchair.
- Fig. 10 is a partial perspective view of the hospital bed connected to and in combination with a leg exercise module.
- a modular bed 20 includes a base 22 having a longitudinally oriented stem (not shown), a pair of outspread diverging arms 24 on one end thereof forming a foot end cavity 25 between the diverging arms 24. Casters 26 are mounted at the rear corners of the base 22 and to the ends of the outspread arms 24.
- the bed 20 further includes a mainframe 27 and linkage (not shown) mounting the mainframe 27 above the base 22, thereby permitting the mainframe 27 to be selectively raised and lowered in the vertical direction with respect to the base 22.
- the mainframe 27 includes a pair of longitudinally oriented rails or frame members 28 which span the length of the bed 20. Connected to the head end of each of the rails 28 is a transverse cross member 29 from which a head board 30 extends upwardly.
- each of the rails 28 includes a laterally outwardly diverging section 32.
- pivoting footboard halves 34 Pivotally attached to the ends 33 of the sections 32 are pivoting footboard halves 34.
- the pivoting footboard halves or footgates 34 when oriented generally colinear with each other at the foot end of the bed 20 function together as a footboard for protection of the user when the bed 20 is in the bed configuration of Fig. 1.
- Each of the footboard halves 34 can be pivoted approximately 90° toward the head end of the bed, so that they extend along the lateral sides of the bed 20 and are generally parallel with each other.
- the footboard halves 34 function separately as side guards/handrails for aiding a patient in egressing from the bed when the bed is configured as a chair (Fig. 2).
- the bed 20 further includes user guards 35 which are connected to the mainframe 27 and are mounted about a user support platform 36.
- the user support platform 36 has a multiple component overlying mattress 37 on which a user is situated, and at least a portion of which is preferably inflated.
- the user support platform 36 can be converted to and between the generally horizontal bed configuration of Fig. 1 and a chair configuration as shown in Fig. 2.
- the user support platform 36 is articulated and consists of a plurality of serially hinged platform sections, including a head panel 38, a seat panel 40, a thigh panel 42, and leg panel 44, which includes a calf supporting panel 46, and a foot supporting panel 48.
- the foot supporting panel 48 is pivotally connected at its head end to the foot end of the calf supporting panel 46 by hinges 50.
- the head end of the leg panel section 44 is similarly hinged to the seat panel 40.
- a mattress section 52 covers the leg panel 44 and includes a resilient foam section surrounded by a sheet made of a flexible material.
- a second mattress section 54 overlies the balance of the user support platform 36 and includes arms or bolsters 56 which overlie lateral portions 58 of the leg panel 44.
- the foot support panel 48 and calf support panel 46 generally lie within a common plane.
- the user support platform 36 is translated longitudinally toward the head end of the bed.
- the head panel 38 pivots upwardly and the foot panel 48 moves approximately 90° to a generally vertically position.
- the foot end of calf support 46 pivot downwardly and the head end of calf support 46 to move upwardly.
- a rollable general purpose cart module 90 extends substantially within the vacatable foot portion 60 and foot end cavity 25 and is dockable, that is, removably coupled or connected to the ends 33 of the arms 32 of the main frame 27.
- the general purpose cart 90 comprises a lower frame 92, an upper frame 94, a pair of vertical rear posts 96 connected between the lower and upper frames 92, 94, and a pair of vertical forward posts 98, also connected between the lower and upper frames 92, 94.
- a support frame structure 100 is slidably mounted on and between a forward cross member 102 and a rear cross member 104. The support frame structure 100 is slidable from side to side on the cross members 102, 104 between the side bars 106 of the upper frame 94.
- latch blocks 110 are secured to the foot ends 33 of the arms 32 of frame 27.
- Each latch block 110 preferably has a tube with a notch 112 therein for accepting a respective vertical post 96.
- a plunger 114 is spring-loaded towards a closed position by a compression spring 116 within the latch block 110.
- the plunger 114 includes a chamfer 118 and a semi-circular groove 120. The chamfer 118 aids in compressing the plunger 114 and hence compression spring 116 by the rear vertical post 96. Once the vertical post 96 reaches the semi-circular notch 120, the plunger 114 snaps securely against the vertical rear post 96.
- Support pads or plates, for example, ears 122 of Fig. 3 are connected to the lowermost side of the arms 32, and the ears 122 extend laterally and inwardly with respect to the frame 27.
- the general purpose cart 90 is rolled into the vacating foot portion 60 and foot end cavity 25, the lateral side bars 106 of the upper frame 44 slide over the ears 122.
- the rear post 96 engage the latch blocks 110 immediately below the rear cross member 104.
- the general purpose cart 90 may be designed such that the support frame 100 is slidable as described, lockable in a desired position, and manufactured to be at any desired elevation.
- Different therapeutic and user care appliances may be used in association with the cart module 90.
- a motorized passive motion device 130 may be mounted on the support frame 100.
- the passive motion device may be one of several such devices which are commercially available in which an electric motor moves a linkage that exercises the leg of a user independent of the user's muscular system.
- a passive motion device is placed on top of a mattress of the hospital bed and in such position is not at its optimum elevation.
- the cart 90 can be designed to present the passive motion device to the user at the preferred elevation and orientation with respect to the hospital bed and the user's posture.
- Fig. 6 illustrates the combination of the hospital bed 20 and a treadmill 140.
- the treadmill 140 contains vertical posts 142 extending upward from a lower frame 143 that connect to the U-shaped handle bar 144 and couple into the latch blocks 110.
- the treadmill 140 has wheels 146 that permit it to be easily moved between locations. However, the coupling of the latch blocks 110 onto the vertical posts 142 secures the treadmill 140 to the bed 20 during its use by the user.
- the bed 20 may be used in combination with a water care/therapy unit 150, for example, a hydrotherapy tub.
- the hydrotherapy tub 150 includes casters 152 which allow it to be easily moved into the foot end cavity 25 of the base (not shown in Fig. 7) and the vacatable foot portion 60 of the user support platform 36.
- the water care/therapy unit 150 includes vertical docking posts 154 at its rear corners which interlock with the latch blocks 110 thereby securing the unit 150 to the bed 20 and preventing it from moving away from the user during use.
- Fig. 8 illustrates the combination of a commode 160 with the bed 20.
- the commode 160 is more fully described in copending U.S. Patent Application Serial No. 08/503,017 entitled BEDSIDE CABINET FOR STORING APPLIANCES and assigned to the Assignee of the present invention.
- the commode 160 has lateral frame members, for example, the wings 162 which are illustrated in their horizontal position.
- the wings 162 have, at their rearward corners, vertical docking posts 164 which interlock with the latch blocks 110, thereby securing the commode to the bed 20.
- the wings 162 also slide over and are supported by the ears 122 on the arms 32 of the frame 27; and therefore, the commode 160 is raised and lowered with the frame 27 to facilitate use by the user in the transition from the standing to the seated positions and vice versa.
- the commode 160 is designed to be stored within the bed 20; and for that purpose, the wings 162 are collapsible, that is, they fold downward to a generally vertical orientation.
- the commode 160 is more fully described in U.S. Patent Application Serial No. 08/277,243 entitled HOSPITAL BED and assigned to the Assignee of the present invention.
- the frame 166 of the commode 160 has an unobstructed rear side so that the commode bowl 168 may be removed and installed from the commode 160 by moving the bowl 168 through the rear side of the frame 166.
- the commode bowl 168 has a handle 169 extending from the rear side of the bowl 168 to the rear side of the frame 166 to facilitate removal and insulation of the bowl 168.
- the bed 20 may be used in combination with a wheelchair 172.
- the wheelchair 172 is a standard wheelchair that has a support device, for example, a pair of brackets 174 attached to and extending laterally from both sides of the wheelchair 172.
- the brackets 174 permit the wheelchair to be docked into and lifted by the mainframe 27 of the bed 20.
- Each of the brackets 174 includes a docking post 176 which preferably is made from stainless steel tubing.
- the docking posts 176 have vertically oriented upper ends that are terminated with aluminum caps 178.
- Each of the caps 178 is T-shaped with a cylindrical body section (not shown) that is inserted inside the end of the docking post 176 and held in place by a pin or other fastener (not shown).
- Each of the caps 178 further include a cylindrical top 180 which has a diameter greater than the diameter of the docking post 176.
- Plates 182 have first ends preferably welded or otherwise connected to the vertical ends of the docking posts 176, and opposite ends mounted on the ends of the axle 184 of the wheelchair 172.
- the docking posts 176 are generally L-shaped and have generally horizontal lower ends welded or otherwise rigidly connected to ends of inverted J-shaped brackets 186 which, in turn, are attached to the sides of the wheelchair 172.
- the inverted J-shaped brackets 186 are preferably made from flat rectangular bar stock and are connected at locations 188 and 190 to the frame of the wheelchair 172 by tubing straps or other fastening devices.
- the inverted J-shaped brackets 186 have shorter legs 192 that extend in a generally downward and have generally U-shaped or forked members 194.
- the coupling members 194 are oriented so that their open ends are directed laterally outward relative to the wheelchair 172.
- the docking posts 176 interconnect with the latching blocks 110; and the ears 122 are captured within the forked members 174.
- the legs of the forked members 194 overlap with the upper and lower surfaces of the ears 122.
- the latching blocks 110 bear against the lower surfaces of the cylindrical tops 180 of the caps 178; and the ears 122 bear against the upper legs of the forked members 194, thereby lifting the wheelchair 172 with the frame 27. Raising and lowering the wheelchair 172 with the frame 27 assists the user in sitting on and rising from the wheelchair 172, as further described in U.S. Patent Application No. 08/277,243, filed on July 19, 1994 and assigned to the Assignee of the present invention.
- Fig. 10 illustrates the combination of the bed 20 with a nonmotorized leg exercise device 196 which is mounted on casters 198 to facilitate moving it from location to location.
- the leg exercise device 196 is rolled into the contiguous foot end cavity 25 and vacatable foot cavity 60 until the latching blocks 110 interlock with vertical docking posts 200 when secured in that position, the leg exercise device 196 is prevented from moving away from the bed 20 when being used.
- Such a leg exercise device is further described in U.S. Pat. No. 5,513,406 issued 07 May 1996.
- the hospital bed is used with many different care/therapy modules to fill a wide range of user needs and thereby provide improved, comprehensive care.
- the combination of the hospital bed with the care/therapy modules may be used in hospitals, nursing homes, other care facilities, and in the home.
- the capability of providing a wide range of different care/therapy modules provides the user with a greater sense of security and stability in use of the module, thereby improving the user's sense of independence and self-sufficiency.
- the flexibility of the hospital bed in combination with the different care/therapy modules permits a level of user care that would not otherwise be practical, thereby expanding the capability of home care.
- the water care/therapy module may take other forms depending on the nature of care desired.
- the water containment vessel may be made larger and elevated to permit a user to sit therein.
- the user seat would be perforated and a water collection vessel located thereunder.
- the water collection vessel may be larger to fully encompass the user and permit the user to shower therein.
- a water source for the shower may be provided by a self-contained water tank or a hose which is connectable to a faucet.
- the active leg exercise module is illustrated as providing a rotary motion exercise. Alternatively, the module may be designed to provide a back and forth reciprocating leg motion that simulates the climbing of stairs.
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- Health & Medical Sciences (AREA)
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Abstract
Description
- This invention relates generally to hospital beds, and more particularly to a combination of a hospital bed that converts from a bed configuration to a chair configuration in combination with different user care modules.
- During the period of time that a user is confined to a hospital bed, it is generally necessary that the user leave the bed to engage in user care or therapeutic activities, for example, to move to a wheelchair, to use a commode or toilet, to simply sit in a chair, to perform physical therapy, etc. When a weak user is removed from a traditional hospital bed, at least one and sometimes two attendants are required to stabilize, hold and often lift the user from the bed. Further, the process of sitting up and twisting around to obtain access to the side of the bed contorts the user and often induces pain especially, in users in a post-surgical situation. In addition, there are minimal handles and supports that are readily accessible to the user to assist and help in the process. Therefore, traditional beds and techniques have the disadvantages of making the seemingly simple process of getting out of a hospital bed physically difficult, labor intensive and often painful.
- To provide more self sufficiency and to facilitate the process of a user leaving a bed, a hospital bed has been developed which automatically converts from a bed configuration to a chair configuration. Such a hospital bed is disclosed in co-pending U.S. patent application Serial No. 08/277,243 assigned to the assignee of the present invention, and in U.S. Patent Nos. 5,454,126 issued 03 October 1995 and 5,479,666 issued 02 January 1996. In that application and those patents, chair beds are disclosed which have vacatable foot sections which, when the user support platform is lowered to a lowermost position, allow the user's feet to rest directly on the floor. Pivoting footboard halves convert into side guards/handrails that extend longitudinally from the foot end of the bed. The handrails may be grasped by the user to provide stabilization and support in moving from a sitting position to a standing position and in leaving the chair configured bed. Further, the user can also selectively raise and lower the bed to facilitate moving either from a seated to a standing position, or, from a standing to a seated position, respectively.
- Further, the above described hospital bed permits a new method of user handling and care as disclosed in U.S. Pat. No. 5,513,406 issued 07 May 1996, in which a single hospital bed replaces the up to three prior hospital beds of traditional and different designs. Further, the method provides for the docking of different user care modules to the hospital bed during different user care stages.
- An object of the present invention is to provide a hospital bed in combination with different user care modules that provides an environment accommodating user weaknesses and disabilities and that raises the level of physical security for a user in the process of moving from the hospital bed to different ones of the user care modules.
- Another object of the invention is to provide a hospital bed in combination with different user care modules that provides guidance and support for a user in the process of moving from the hospital bed to another user care module, thereby reducing user fear and enhancing user confidence.
- A further object of the invention is to provide a hospital bed in combination with different user care modules that provides a higher level of user independence and self sufficiency, thereby encouraging a user to engage in physical activity and therapy to reduce muscular atrophy and increase a user's sense of wellness.
- To overcome the disadvantages of traditional hospital equipment, the present invention provides a combination of a hospital bed that moves from a bed position to a chair position and different user care modules located at the foot end of the bed so that a user may interface with the user care modules with a high level of security and confidence.
- In accordance with the described embodiments, a bed includes a base having a head end and a foot end. A support platform is mounted on the base and is selectively moveable between a generally planar bed position and a chair position. The support platform includes a head panel that moves to a raised position when moving the support platform to the chair position. The support platform further includes leg and foot panels that move relative to each other and the head panel to a position that allows the patient to leave the bed at the foot end of the base and frame assembly. A care/therapy module is removably coupled to the foot end of the base and frame assembly. The care/therapy module may be a general purpose cart, a motorized leg exercise device, a walking exercise device, a non-motorized leg exercise device, a commode, a wheelchair and/or a hydrotherapy unit.
- The Invention will now be further described by way of example only with reference to the accompanying drawings in which:-
- Fig. 1 is a perspective view of a hospital bed in accordance with the principles of the present invention.
- Fig. 2 is a perspective view of the hospital bed in a chair configuration.
- Fig. 3 is a partial perspective view of the hospital bed in combination with a general purpose cart connected thereto.
- Fig. 4 is a view taken along line 4-4 of Fig. 3.
- Fig. 5 is a partial perspective view of the hospital bed in combination with a cart containing a passive motion device.
- Fig. 6 is a partial perspective view of the hospital bed in combination with and connected to a treadmill.
- Fig. 7 is a partial perspective view of the hospital bed in combination with and connected to a water care/therapy unit.
- Fig. 8 is a partial perspective view of the hospital bed connected to and in combination with a portable commode module.
- Fig. 9 is a partial perspective view of the hospital bed connected to and in combination with a wheelchair.
- Fig. 10 is a partial perspective view of the hospital bed connected to and in combination with a leg exercise module.
- Referring to Fig. 1, a
modular bed 20 includes abase 22 having a longitudinally oriented stem (not shown), a pair ofoutspread diverging arms 24 on one end thereof forming afoot end cavity 25 between the divergingarms 24.Casters 26 are mounted at the rear corners of thebase 22 and to the ends of theoutspread arms 24. Thebed 20 further includes amainframe 27 and linkage (not shown) mounting themainframe 27 above thebase 22, thereby permitting themainframe 27 to be selectively raised and lowered in the vertical direction with respect to thebase 22. Themainframe 27 includes a pair of longitudinally oriented rails orframe members 28 which span the length of thebed 20. Connected to the head end of each of therails 28 is atransverse cross member 29 from which ahead board 30 extends upwardly. At the foot end of themainframe 27, each of therails 28 includes a laterally outwardly divergingsection 32. - Pivotally attached to the
ends 33 of thesections 32 are pivotingfootboard halves 34. The pivoting footboard halves orfootgates 34 when oriented generally colinear with each other at the foot end of thebed 20 function together as a footboard for protection of the user when thebed 20 is in the bed configuration of Fig. 1. Each of thefootboard halves 34 can be pivoted approximately 90° toward the head end of the bed, so that they extend along the lateral sides of thebed 20 and are generally parallel with each other. When in this position, thefootboard halves 34 function separately as side guards/handrails for aiding a patient in egressing from the bed when the bed is configured as a chair (Fig. 2). Thebed 20 further includesuser guards 35 which are connected to themainframe 27 and are mounted about auser support platform 36. - The
user support platform 36 has a multiplecomponent overlying mattress 37 on which a user is situated, and at least a portion of which is preferably inflated. Theuser support platform 36 can be converted to and between the generally horizontal bed configuration of Fig. 1 and a chair configuration as shown in Fig. 2. Theuser support platform 36 is articulated and consists of a plurality of serially hinged platform sections, including ahead panel 38, aseat panel 40, athigh panel 42, andleg panel 44, which includes acalf supporting panel 46, and afoot supporting panel 48. Thefoot supporting panel 48 is pivotally connected at its head end to the foot end of thecalf supporting panel 46 by hinges 50. The head end of theleg panel section 44 is similarly hinged to theseat panel 40. Amattress section 52 covers theleg panel 44 and includes a resilient foam section surrounded by a sheet made of a flexible material. Asecond mattress section 54 overlies the balance of theuser support platform 36 and includes arms orbolsters 56 which overlielateral portions 58 of theleg panel 44. - More particularly, in referring to Fig. 1, it will be seen that when in the bed position, the
foot support panel 48 andcalf support panel 46 generally lie within a common plane. In moving from the bed position of Fig. 1 to the chair position of Fig. 2, theuser support platform 36 is translated longitudinally toward the head end of the bed. As theplatform 36 rolls toward the head end of thebed 20, thehead panel 38 pivots upwardly and thefoot panel 48 moves approximately 90° to a generally vertically position. Continued longitudinal movement of theplatform 36 causes the foot end ofcalf support 46 to pivot downwardly and the head end ofcalf support 46 to move upwardly. By virtue of its pivoted connection 50 tothigh panel 42, movement of theplatform 36 causescalf panel 46 to be rotated approximately 90° downward to a generally vertical position; and thefoot support 48 is moved approximately 180° with respect to thecalf panel 46 and 270° with respect to its original position. Thus, in the chair position of Fig. 2, thefoot panel 48 is positioned aft of the generally verticallycalf panel 46, and is generally juxtaposed to or against thecalf panel 46. Moving thebed 20 to the chair position of Fig. 2 forms avacatable foot portion 60 within theuser support platform 36 which together with thefoot end cavity 25 of thebase 22 permits the user to easily egress from the foot end of thebed 20. - Many different user care/rehabilitation modules may be coupled to the foot end of the
bed 20. Some of the modules require that the user move through thevacatable foot portion 60 andfoot end cavity 25 to use the module. Other modules are designed to themselves substantially occupy thevacatable foot portion 60 and thefoot end cavity 25. For example, referring to Fig. 3, a rollable generalpurpose cart module 90 extends substantially within thevacatable foot portion 60 andfoot end cavity 25 and is dockable, that is, removably coupled or connected to theends 33 of thearms 32 of themain frame 27. Thegeneral purpose cart 90 comprises alower frame 92, anupper frame 94, a pair of verticalrear posts 96 connected between the lower andupper frames upper frames support frame structure 100 is slidably mounted on and between aforward cross member 102 and arear cross member 104. Thesupport frame structure 100 is slidable from side to side on thecross members upper frame 94. - As shown in Fig. 4, latch blocks 110 are secured to the foot ends 33 of the
arms 32 offrame 27. Each latch block 110 preferably has a tube with anotch 112 therein for accepting a respectivevertical post 96. Aplunger 114 is spring-loaded towards a closed position by acompression spring 116 within thelatch block 110. Theplunger 114 includes achamfer 118 and asemi-circular groove 120. Thechamfer 118 aids in compressing theplunger 114 and hencecompression spring 116 by the rearvertical post 96. Once thevertical post 96 reaches thesemi-circular notch 120, theplunger 114 snaps securely against the verticalrear post 96. - Support pads or plates, for example,
ears 122 of Fig. 3 are connected to the lowermost side of thearms 32, and theears 122 extend laterally and inwardly with respect to theframe 27. When thegeneral purpose cart 90 is rolled into the vacatingfoot portion 60 andfoot end cavity 25, the lateral side bars 106 of theupper frame 44 slide over theears 122. Simultaneously, therear post 96 engage the latch blocks 110 immediately below therear cross member 104. Once thecart 90 is secured in place with respect to theframe 27, thecart 90 travels in the vertical direction with theframe 27 and theuser support platform 36 as they are raised and lowered. Thecart 90 is supported at its forward end by theears 122 bearing underneath the forward upper bars 106. Thecart 90 is supported in the rear by the uppermost surfaces of the latch blocks 110 bearing against a lower surface of therear cross member 104. - The
general purpose cart 90 may be designed such that thesupport frame 100 is slidable as described, lockable in a desired position, and manufactured to be at any desired elevation. Different therapeutic and user care appliances may be used in association with thecart module 90. For example, as illustrated in Fig. 5, a motorizedpassive motion device 130 may be mounted on thesupport frame 100. The passive motion device may be one of several such devices which are commercially available in which an electric motor moves a linkage that exercises the leg of a user independent of the user's muscular system. Typically, a passive motion device is placed on top of a mattress of the hospital bed and in such position is not at its optimum elevation. With the apparatus of Fig. 5, thecart 90 can be designed to present the passive motion device to the user at the preferred elevation and orientation with respect to the hospital bed and the user's posture. - Fig. 6 illustrates the combination of the
hospital bed 20 and atreadmill 140. Thetreadmill 140 containsvertical posts 142 extending upward from alower frame 143 that connect to theU-shaped handle bar 144 and couple into the latch blocks 110. Thetreadmill 140 haswheels 146 that permit it to be easily moved between locations. However, the coupling of the latch blocks 110 onto thevertical posts 142 secures thetreadmill 140 to thebed 20 during its use by the user. - Referring to Fig. 7, the
bed 20 may be used in combination with a water care/therapy unit 150, for example, a hydrotherapy tub. Thehydrotherapy tub 150 includescasters 152 which allow it to be easily moved into thefoot end cavity 25 of the base (not shown in Fig. 7) and thevacatable foot portion 60 of theuser support platform 36. The water care/therapy unit 150 includesvertical docking posts 154 at its rear corners which interlock with the latch blocks 110 thereby securing theunit 150 to thebed 20 and preventing it from moving away from the user during use. - Fig. 8 illustrates the combination of a
commode 160 with thebed 20. Thecommode 160 is more fully described in copending U.S. Patent Application Serial No. 08/503,017 entitled BEDSIDE CABINET FOR STORING APPLIANCES and assigned to the Assignee of the present invention. Thecommode 160 has lateral frame members, for example, thewings 162 which are illustrated in their horizontal position. Thewings 162 have, at their rearward corners,vertical docking posts 164 which interlock with the latch blocks 110, thereby securing the commode to thebed 20. Thewings 162 also slide over and are supported by theears 122 on thearms 32 of theframe 27; and therefore, thecommode 160 is raised and lowered with theframe 27 to facilitate use by the user in the transition from the standing to the seated positions and vice versa. It should be noted that thecommode 160 is designed to be stored within thebed 20; and for that purpose, thewings 162 are collapsible, that is, they fold downward to a generally vertical orientation. Thecommode 160 is more fully described in U.S. Patent Application Serial No. 08/277,243 entitled HOSPITAL BED and assigned to the Assignee of the present invention. Theframe 166 of thecommode 160 has an unobstructed rear side so that thecommode bowl 168 may be removed and installed from thecommode 160 by moving thebowl 168 through the rear side of theframe 166. Thecommode bowl 168 has ahandle 169 extending from the rear side of thebowl 168 to the rear side of theframe 166 to facilitate removal and insulation of thebowl 168. - Referring to Fig. 9, the
bed 20 may be used in combination with a wheelchair 172. The wheelchair 172 is a standard wheelchair that has a support device, for example, a pair of brackets 174 attached to and extending laterally from both sides of the wheelchair 172. The brackets 174 permit the wheelchair to be docked into and lifted by themainframe 27 of thebed 20. Each of the brackets 174 includes adocking post 176 which preferably is made from stainless steel tubing. The docking posts 176 have vertically oriented upper ends that are terminated withaluminum caps 178. Each of thecaps 178 is T-shaped with a cylindrical body section (not shown) that is inserted inside the end of thedocking post 176 and held in place by a pin or other fastener (not shown). Each of thecaps 178 further include a cylindrical top 180 which has a diameter greater than the diameter of thedocking post 176.Plates 182 have first ends preferably welded or otherwise connected to the vertical ends of the docking posts 176, and opposite ends mounted on the ends of theaxle 184 of the wheelchair 172. The docking posts 176 are generally L-shaped and have generally horizontal lower ends welded or otherwise rigidly connected to ends of inverted J-shapedbrackets 186 which, in turn, are attached to the sides of the wheelchair 172. The inverted J-shapedbrackets 186 are preferably made from flat rectangular bar stock and are connected atlocations brackets 186 haveshorter legs 192 that extend in a generally downward and have generally U-shaped or forkedmembers 194. Thecoupling members 194 are oriented so that their open ends are directed laterally outward relative to the wheelchair 172. - As the wheelchair 172 is rolled into the
foot cavity 25 of thebed 20, the docking posts 176 interconnect with the latching blocks 110; and theears 122 are captured within the forked members 174. The legs of the forkedmembers 194 overlap with the upper and lower surfaces of theears 122. As theframe 27 is raised, the latching blocks 110 bear against the lower surfaces of the cylindrical tops 180 of thecaps 178; and theears 122 bear against the upper legs of the forkedmembers 194, thereby lifting the wheelchair 172 with theframe 27. Raising and lowering the wheelchair 172 with theframe 27 assists the user in sitting on and rising from the wheelchair 172, as further described in U.S. Patent Application No. 08/277,243, filed on July 19, 1994 and assigned to the Assignee of the present invention. - Fig. 10 illustrates the combination of the
bed 20 with a nonmotorizedleg exercise device 196 which is mounted oncasters 198 to facilitate moving it from location to location. Theleg exercise device 196 is rolled into the contiguousfoot end cavity 25 andvacatable foot cavity 60 until the latching blocks 110 interlock withvertical docking posts 200 when secured in that position, theleg exercise device 196 is prevented from moving away from thebed 20 when being used. Such a leg exercise device is further described in U.S. Pat. No. 5,513,406 issued 07 May 1996. - In use, the hospital bed is used with many different care/therapy modules to fill a wide range of user needs and thereby provide improved, comprehensive care. The combination of the hospital bed with the care/therapy modules may be used in hospitals, nursing homes, other care facilities, and in the home. The capability of providing a wide range of different care/therapy modules provides the user with a greater sense of security and stability in use of the module, thereby improving the user's sense of independence and self-sufficiency. In environments, such as the home, where a full bath facility may not be readily available, the flexibility of the hospital bed in combination with the different care/therapy modules permits a level of user care that would not otherwise be practical, thereby expanding the capability of home care.
- While the preferred embodiments have been described in considerable detail additional advantages and modifications will readily appear to those who are skilled in the art. For example, the water care/therapy module may take other forms depending on the nature of care desired. For example, the water containment vessel may be made larger and elevated to permit a user to sit therein. With a bath-type module, the user seat would be perforated and a water collection vessel located thereunder. Alternatively, the water collection vessel may be larger to fully encompass the user and permit the user to shower therein. A water source for the shower may be provided by a self-contained water tank or a hose which is connectable to a faucet. The active leg exercise module is illustrated as providing a rotary motion exercise. Alternatively, the module may be designed to provide a back and forth reciprocating leg motion that simulates the climbing of stairs.
Claims (15)
- A bed facilitating comprehensive care of a user comprising a base and frame assembly having a foot end, an articulated support platform mounted on the base and frame assembly and selectively movable between a generally planar bed position and a chair position, the articulated support platform including a head panel moving to a raised position when moving the support platform to the chair position, and leg and foot panels moving relative to each other and the head panel to a position allowing the user to leave the bed through the foot end of the base and frame assembly when the support platform is in the chair position, and a care/therapeutic module removably coupled to the foot end of the base and frame assembly.
- A bed as claimed in Claim 1 further comprising a latch connected to the base and frame assembly adjacent the foot end for receiving a member of the care/therapeutic module.
- A bed as claimed in Claim 2 wherein the latch comprises a tube having an opening in a tube side wall proximate one end of the tube for receiving the member of the care/therapeutic module, a plunger slidably mounted within the tube, the plunger having a notch in one end for capturing the member of the care/therapeutic module, and a spring biasing the plunger toward the one end of the tube and pushing the member of the care/therapeutic module against a wall of the opening in the tube, thereby securing the member of the care/therapeutic module in a latched position with respect to the bed.
- A bed as claimed in any preceding Claim wherein the care/therapeutic module comprises.
- A bed as claimed in any preceding Claim a wheelchair and/or a hydrotherapy device wherein the care/therapeutic module comprises a commode and wherein the base and frame assembly further comprise a plurality of support members for receiving and supporting frame members on the commode.
- A bed as claimed in Claim 5 wherein the frame moves in a generally vertical direction with respect to the base and the support members are connected to the frame to support and carry the commode in the generally vertical direction with the frame.
- A bed as claimed in either Claim 5 or Claim 6 wherein the commode includes a docking element and the support members include a latch connected to the frame for receiving the docking element.
- A bed as claimed in Claim 7 wherein the support members further comprise fixed surfaces located beneath different frame elements of the commode for supporting and lifting the commode with the frame.
- A bed as claimed in Claim 8 wherein the support member further comprises at least three fixed surfaces.
- A bed as claimed in either Claim 8 or Claim 9 wherein the support members further comprise four fixed surfaces located beneath different frame elements of the commode located proximate corners of the commode.
- A bed as claimed in a preceding Claim wherein the care/therapeutic module comprises a wheelchair and the base and frame assembly further comprise a support member for receiving and supporting the support device of the wheelchair.
- A bed of as claimed in Claim 11 wherein the support device comprises a bracket extending from the wheelchair.
- A bed as claimed in either Claim 11 or Claim 1 wherein the support device further includes pair of brackets extending laterally from each side of the wheelchair.
- A bed as claimed in Claim 13 wherein the frame moves in a generally vertical direction with respect to the base and the frame further comprises a plurality of support members connected to the frame for supporting the pair of brackets to support and carry the wheelchair in the generally vertical direction with the frame.
- A bed as claimed in either Claim 13 or Claim 14 wherein each of the pair of brackets has one end connected to one end of an axle of the wheelchair and an opposite end connected to a frame of the wheelchair.
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US08/509,756 US5680661A (en) | 1990-05-16 | 1995-08-03 | Hospital bed with user care apparatus |
US509756 | 1995-08-03 |
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EP0756857A3 EP0756857A3 (en) | 1997-06-04 |
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-
1996
- 1996-08-02 AT AT96305728T patent/ATE254438T1/en not_active IP Right Cessation
- 1996-08-02 DE DE69630739T patent/DE69630739T2/en not_active Expired - Fee Related
- 1996-08-02 EP EP96305728A patent/EP0756857B1/en not_active Expired - Lifetime
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US5454126A (en) | 1994-01-25 | 1995-10-03 | Hill-Rom Company, Inc. | Foot egress chair bed |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US8370978B2 (en) | 2009-07-17 | 2013-02-12 | Hill-Rom S.A.S. | Hospital bed equipped with a patient mobility aid device |
EP2484326A3 (en) * | 2011-02-03 | 2012-12-19 | Hill-Rom Services, Inc. | Patient support apparatus with multipurpose foot deck section |
Also Published As
Publication number | Publication date |
---|---|
EP0756857A3 (en) | 1997-06-04 |
EP0756857B1 (en) | 2003-11-19 |
ATE254438T1 (en) | 2003-12-15 |
DE69630739D1 (en) | 2003-12-24 |
DE69630739T2 (en) | 2004-06-03 |
US5680661A (en) | 1997-10-28 |
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